Impact of Collisional Matter on the Late-Time Dynamics of f(R,T) Gravity

Zubair, M.; Zeeshan, Muhammad; Hasan, Syed Sibet; Oikonomou, V. K.

doi:10.3390/sym10100463

Cited by 16 publications

(8 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This type of models offer the non-minimal coupling of curvature and matter components. The similar type of choice has been recently used to measure the impact of collision matter on the late-time dynamics of f (R, T ) gravity [61]. In this case, homologous and homogeneous conditions will take the form as…”

Section: Cmentioning

confidence: 99%

Complexity analysis of cylindrically symmetric self-gravitating dynamical system in f(R,T) theory of gravity

Zubair

Azmat

2020

Physics of the Dark Universe

Self Cite

View full text Add to dashboard Cite

In this article, we have studied a cylindrically symmetric self-gravitating dynamical object via complexity factor which is obtained through orthogonal splitting of Reimann tensor in f (R, T) theory of gravity. Our study is based on the definition of complexity for dynamical sources, proposed by Herrera [14]. We actually want to analyze the behavior of complexity factor for cylindrically symmetric dynamical source in modified theory. For this, we define the scalar functions through orthogonal splitting of Reimann tensor in f (R, T) gravity and work out structure scalars for cylindrical geometry. We evaluated the complexity of the structure and also analyzed the complexity of the evolutionary patterns of the system under consideration. In order to present simplest mode of evolution, we explored homologous condition and homogeneous expansion condition in f (R, T) gravity and discussed dynamics and kinematics in the background of a generic viable non-minimally coupled f (R, T) = α1R m T n + α2T (1 + α3T p R q) model. In order to make a comprehensive analysis, we considered three different cases (representing both minimal and non-minimal coupling) of the model under consideration and found that complexity of a system is increased in the presence of higher order curvature terms, even in the simplest modes of evolution. However, higher order trace terms affects the complexity of the system but they are not crucial for simplest modes of evolution in the case of minimal coupling. The stability of vanishing of complexity factor has also been discussed.

show abstract

Section: Cmentioning

confidence: 99%

Complexity analysis of cylindrically symmetric self-gravitating dynamical system in f(R,T) theory of gravity

Zubair

Azmat

2020

Physics of the Dark Universe

Self Cite

View full text Add to dashboard Cite

show abstract

“…Perturbation techniques were used in the study of spherical and cylindrical gravitating sources [7,8] and the effects of f (R, T ) gravity on astrophysical structures like wormholes and gravitational vacuum stars were measured in [9]. Zubair et al [10] studied cosmic evolution in the presence of collision matter and measured its impacts on late-time dynamics in the context of this viable modified theory. Singh et al [11] proposed a new form for the parametrization of Hubble parameter which varies with the cosmic time t and studied the evolution of universe in the framework of f (R, T ) gravity.…”

Section: Introductionmentioning

confidence: 99%

An anisotropic version of Tolman VII solution in f(R, T) gravity via gravitational decoupling MGD approach

Azmat

Zubair

2021

Eur. Phys. J. Plus

Self Cite

View full text Add to dashboard Cite

In this work, we have adopted gravitational decoupling by Minimal Geometric Deformation (MGD) approach and have developed an anisotropic version of well-known Tolman VII isotropic solution in the framework of f (R, T ) gravity, where R is Ricci scalar and T is trace of energy momentum tensor. The set of field equations has been developed with respect to total energy momentum tensor, which combines effective energy momentum tensor in f (R, T ) gravity and additional source φij. Following MGD approach, the set of field equations has been separated into two sections. One section represents f (R, T ) field equations, while the other is related to the source φij. The matching conditions for inner and outer geometry have also been discussed and an anisotropic solution has been developed using mimic constraint for radial pressure. In order to check viability of the solution, we have considered observation data of three different compact star models, named PSR J1614-2230, PSR 1937+21 and SAX J1808.4-3658 and have discussed thermodynamical properties analytically and graphically. The energy conditions are found to be satisfied for the three compact stars. The stability analysis has been presented through causality condition and Herrera's cracking concept, which ensures physical acceptability of the solution.

show abstract

“…A cosmological solution was obtained for the special case F(R, T ) = R + 2λT , being λ a constant, and the findings turned out to be compatible with recent observational data. The cosmic evolution of non-minimally coupled F(R, T ) gravity in the presence of matter fluids consisting of collisional self-interacting dark matter and radiation was studied in [85], comparing the results with those corresponding to non-collisional matter and to the ΛCDM model. In particular, a flat FLRW universe was considered, focusing on the late-time dynamical evolution of the model.…”

Section: Cosmological Aspects Of Mamg Theoriesmentioning

confidence: 99%

Metric-Affine Myrzakulov Gravity Theories

Myrzakulov

Ravera

2021

Symmetry

View full text Add to dashboard Cite

In this paper, we review the so-called Myrzakulov Gravity models (MG-N, with N=I,II,…,VIII) and derive their respective metric-affine generalizations (MAMG-N), discussing also their particular sub-cases. The field equations of the theories are obtained by regarding the metric tensor and the general affine connection as independent variables. We then focus on the case in which the function characterizing the aforementioned metric-affine models is linear and consider a Friedmann-Lemaître–Robertson–Walker background to study cosmological aspects and applications. Historical motivation for this research is thoroughly reviewed and specific physical motivations are provided for the aforementioned family of alternative theories of gravity.

show abstract

Impact of Collisional Matter on the Late-Time Dynamics of f(R,T) Gravity

Cited by 16 publications

References 66 publications

Complexity analysis of cylindrically symmetric self-gravitating dynamical system in f(R,T) theory of gravity

Complexity analysis of cylindrically symmetric self-gravitating dynamical system in f(R,T) theory of gravity

An anisotropic version of Tolman VII solution in f(R, T) gravity via gravitational decoupling MGD approach

Metric-Affine Myrzakulov Gravity Theories

Contact Info

Product

Resources

About